The maze below is by Erich Friedmann. Roll a block into the hollow
section.

In the above rolling block maze, you must move the multicolored block
into the hollow frame. The picture can be moved around. It
was made with LiveGraphics3D
and
Mathematica.
To help you, you may move around the three red blocks. Erich
Friedman designed this maze, and he claims to have a 280 move solution.
Send
Answer. Another nice rolling block puzzle by Erich is below.
This time, the block is a U-pentomino.